Halo...

I'm just opening a margin account, and I learned about the Regulation T margin.

I'm stating:
" As governed by the Federal Reserve's Regulation T, when a trader buys on margin, key levels must be maintained throughout the life of the trade. First off, a broker cannot extend any credit to accounts with less than $2,000 in cash (or securities). Second, the initial margin of 50% is required for a trade to be entered. Finally, the maintenance margin says that an equity level of at least 25% must be maintained. The investor will be hit with a margin call if the value of securities falls below the maintenance margin."

I is the Reg T requirement, 50% of the stock value -
Does it flactuate with the stock price? let's say I bought $10,000 worth of stock X.
I need to have $5,000 of my money (Reg T).
It went down 10% to $9,000. is the Reg T requirement is now $4,500, or it remembers the initial stock price I bought, and stays Reg T of 5,000. (because remember, my loan is 5,000. so in the first case of Reg T 4,500, I'm gonna bigger loan in the stock (5,000 loan) than my money (4,500).

Dave